Dual-energy radiographic absorptiometry of the lumbar spine: clinical experience with two different systems.
Dual-energy radiographic absorptiometry (DRA) of the lumbar spine was performed in 222 subjects (aged 17-92 years) of both sexes with use of two different systems. In a sub-group of 21 patients, results were compared with those obtained by means of dual-photon absorptiometry (DPA) of the lumbar spine. There was a high correlation among the results obtained with three instruments (r = .9, P less than .0001), and interconversion factors were calculated. Data conversion based on these regression equations may be useful for comparing results from one laboratory to another.
Gundry
C R
CR
Department of Radiology, Veterans Administration Medical Center, San Diego, CA 92161.
Miller
C W
CW
Ramos
E
E
Moscona
A
A
Stein
J A
JA
Mazess
R B
RB
Sartoris
D J
DJ
Resnick
D
D
D015502:Absorptiometry, Photon / Q000379:methods; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015519:Bone Density; D005260:Female; D006801:Humans; D008159:Lumbar Vertebrae / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D010024:Osteoporosis / Q000000981:diagnostic imaging; D015900:Radiography, Dual-Energy Scanned Projection / Q000379:methods*; D012044:Regression Analysis